cinder-volume/cinder-backup service are marked as down while image related I/O operation is run

Solution Unverified - Updated 2019-10-24T02:31:54+00:00 -

Issue

cinder-volume/cinder-backup service were marked as down while image related I/O operation was run.
Other messages showed that DB connection got an error and AMQP connection missed many heartbeats.

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